A foreign friendly culture: you will be surprised by the difference in business culture between both countries. In Bangladesh it is very common to be invited by the owner of the company to his place and meet his family. For Bangladeshi people it is a way to show respect to their business partners and to understand better the culture of the country.
Outfit: There are no specific rules when it comes to outfits. Bangladesh has traditional clothes as well as western clothes. But usually meetings are held in western clothes. For women moderately dressed is advisable.
Planning your transport: Dhaka is a very populated city compared to its space. Traffic can be a problem so plan you appointment ahead of time.
Greeting: greeting is similar to other countries, through handshaking and nodding heads.